I have already found a solution for this and applied it upstream (1.27.5, already in Grrovy).
The problem is that near midnight, for the log rotate cups-browsed is stopped and restarted. Stopping cups-browsed makes the cups-browsed- generated print queues getting removed and when re-starting cups-browsed afterwards they are generated again. This causes the notifications. My approach is to let cups-browsed not remove the queues on shut-down, on re-start cups-browsed connects to these queues again (as I have designed cups-browsed to cope with crashes) and so no queue-creation happens. Zdenek Dohnal from Red Hat suggests modifying gnome-settings-daemon to identify queues coming from cups-browsed and not notifying then. See https://github.com/OpenPrinting/cups-filters/issues/241 Marking as fixed as my approach has made it into Groovy already. ** Bug watch added: github.com/OpenPrinting/cups-filters/issues #241 https://github.com/OpenPrinting/cups-filters/issues/241 ** Changed in: cups (Ubuntu) Status: Triaged => Fix Released ** Package changed: cups (Ubuntu) => cups-filters (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1869981 Title: Printer notification every day at midnight Status in cups-filters package in Ubuntu: Fix Released Bug description: Every day, all my 20.04 machines get a notification that the printer in my house has been detected. The printer works fine and is already added. So not sure why I need to be told repeatedly that I have a printer on the network? (see screenshot) ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: cups 2.3.1-9ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu21 Architecture: amd64 CupsErrorLog: CurrentDesktop: ubuntu:GNOME Date: Wed Apr 1 00:00:31 2020 InstallationDate: Installed on 2020-03-01 (30 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200301) Lpstat: device for HP_LaserJet_100_colorMFP_M175nw_6DCDD4_: implicitclass://HP_LaserJet_100_colorMFP_M175nw_6DCDD4_/ MachineType: LENOVO 20BV001BUK Papersize: a4 PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/HP_LaserJet_100_colorMFP_M175nw_6DCDD4_.ppd'] failed with exit code 2: grep: /etc/cups/ppd/HP_LaserJet_100_colorMFP_M175nw_6DCDD4_.ppd: Permission denied ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_pyyy5h@/vmlinuz-5.4.0-21-generic root=ZFS=rpool/ROOT/ubuntu_pyyy5h ro quiet splash vt.handoff=1 SourcePackage: cups UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/14/2019 dmi.bios.vendor: LENOVO dmi.bios.version: JBET73WW (1.37 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BV001BUK dmi.board.vendor: LENOVO dmi.board.version: 0B98417 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET73WW(1.37):bd08/14/2019:svnLENOVO:pn20BV001BUK:pvrThinkPadT450:rvnLENOVO:rn20BV001BUK:rvr0B98417WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T450 dmi.product.name: 20BV001BUK dmi.product.sku: LENOVO_MT_20BV_BU_Think_FM_ThinkPad T450 dmi.product.version: ThinkPad T450 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups-filters/+bug/1869981/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
